Update actions/checkout action to v4 #69

	name: Continious Integration

	on:
	pull_request

	jobs:
	black:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Run black
	uses: actions/setup-python@v5
	with:
	python-version: 3.8
	- name: install black
	run: pip install "black<23"
	- name: run black
	run: black --check pymzml

	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python: ['3.8', '3.9', '3.10']
	steps:
	- uses: actions/checkout@v4
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python }}
	- name: install tox
	run: pip install tox
	- name: Tox
	run: tox -e py

Provide feedback